Iaroslav Pershin Email & Phone Number

Limassol, Cyprus

Limassol, Cyprus

- Designed and implemented APIs using AWS Serverless Framework (Golang, API Gateway, Lambda, DynamoDB, SQS and other AWS Services).- Refactored code architecture, implemented Hexagonal architecture improve testability and maintainability. Providing application performance monitoring. Improved application performance and stability up to 40%.- Implemented comprehensive monitoring solutions utilizing AWS CloudWatch, customizing dashboards, setting up alarms, X-Ray traces, third-party API monitoring and custom metrics. MTTD and MTTR significantly reduced. - CI/CD strategy reviewed. Added triggers, approval rules, new environments,pipelines, notifications, and auto-testing. Refactored CloudFormation stacks using SAM capabilities.- Security review in scope of PCI DSS and GDPR compliance. Created alerting and auto-remediation tools to reduce toil up to 30%. Conducted quarterly security audits, risk assessments and penetration tests. PCI DSS Tier 1 certificate achieved.- Created ETL solution for user data analytics in AWS Quick Sight to help customer create BI reporting and loyalty programs.- Provided efficient cost management to reduce costs up to 20%.

- Introduced auto-generated steps running in parallel within CI pipelines, resulting in a remarkable 50% reduction in build time. Implemented Jenkins shared libraries following the DRY approach, leading to 80% decrease in pipeline development times.- Implemented Infrastructure as Code using Terraform and automation scripts seamlessly integrated with CI/CD pipelines, ensuring consistent and reliable infrastructure provisioning.- Successfully migrated applications Kubernetes, OpenShift, or ECS, enhancing scalability and durability- Implemented comprehensive monitoring, alerting, and dashboarding solutions alongside centralized log storage, providing insights into system health and performance, thus enabling proactive issue resolution.- Infrastructure optimized in a cost-effective way: costs reduced by 30%.

- Successfully transitioned from a legacy monitoring system to Prometheus, enriching our monitoring capabilities with new metrics, alerts, and runbooks. Resulted in a significant reduction of incident response times, achieving up to a remarkable 50% improvement.- Implemented improvements to CI/CD processes resulting in faster and more efficient deployments. Created Ansible playbooks and roles for better configuration management. New deployments completed over 25% faster with significantly reduced toil.- Developed Helm charts for microservices deployments, streamlining the deployment process and ensuring consistency and reliability across our distributed architecture.- Provided efficient Level 3 (L3) application support, performing on-call duties, and consistently meeting target SLAs.

- Spearheaded strategic network design initiatives and optimized configurations to enhance the performance, reliability, and security of network infrastructure.- Improved incident management process, orchestrated efficient response strategies to critical network events while ensuring alignment with target SLAs.- Implemented proactive measures to optimize the utilization of network resources, minimizing wastage and maximizing efficiency in bandwidth allocation, routing, and traffic management.- Automation of routine tasks, leveraging scripting languages to streamline workflows and reduce manual intervention.